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Справочник по обработчику правил Azure CDN Verizon Premium

В этой статье подробно описаны доступные условия соответствия и компоненты для обработчика правил сети доставки содержимого (CDN) Azure.

Обработчик правил принимает решения о том, как CDN обрабатывает определенные типы запросов.

С его помощью можно:

  • определять или переопределять пользовательские политики кэширования;
  • защищать или отклонять запросы на получение конфиденциального содержимого;
  • перенаправлять запросы;
  • хранить настраиваемые данные журнала.

Устройство и принцип работы коробки передач CVT

Итак, аббревиатура CVT (от англ. Continuously Variable Transmission, что дословно означает «постоянно изменяющаяся передача»), используется для обозначения вариаторной коробки передач, которая более известна среди автолюбителей как вариатор. Разобравшись с тем, что означает CVT коробка передач, можно перейти к особенностям конструкции и принципам работы вариатора.

  • Главной особенностью такой коробки является то, что вариатор представляет собой бесступенчатую трансмиссию. Чтобы было понятно, МКПП, роботы и АКПП имеют фиксированные передачи (скорости) с разным передаточным отношением, которых может быть 4, 5, 6 и т.д.

Ведущий шкив присоединяется к коленчатому валу ДВС, в то время как ведомый посредством приводных валов соединяется с другими элементами трансмиссии для эффективной передачи крутящего момента на ведущие колеса автомобиля.

При этом в зависимости от оборотов двигателя и нагрузки диаметр шкивов (как ведущего, так и ведомого), постоянно, гибко и динамично меняется, что и позволяет «натянуть» или «ослабить» клиновидный ремень вариатора. Так изменяется передаточное отношение. Работает вся система под управлением электроники, также в устройстве вариатора активно используется гидравлика.

Параллельно не происходит разрыва потока мощности, который присутствует на других КПП в момент переключений. Передаточное отношение при движении авто изменяется постоянно. Электроника учитывает скорость движения ТС, нагрузки на двигатель, обороты, угол открытия дроссельной заслонки, положение педали газа и т.д., позволяя силовому агрегату в связке с трансмиссией всегда работать в оптимальных режимах.

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How ImageEngine Works

Detect device, browser at CDN’s edge server.

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Fetch original image.

Resize, compress, and convert to optimal file format for device.

Deliver via CDN.

Subsequent requests delivered from cache.

What Makes ImageEngine Different?

30% faster than other CDNs.

49% more efficient image payload optimization.

Device-aware edge servers capable of optimizing for over 76,000 device profiles.

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Maintain Image Quality

Automatically produces images with highest visual quality and lowest possible byte size.

Ensures image quality surpasses what is perceptible on each requesting device.

Optimizes based on device size, resolution, and image format.

Monitors structural similarity index and adjusts for thresholds of perceptible image quality.

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Faster page load times are always a good goal for your website, but did you know the impact of load times on conversion and bounce rate?

Users expect pages to load in 3-5 seconds, or they will start to abandon, but the average image-heavy website takes at least 8-10 seconds. This disconnect can cost eCommerce sites millions in lost sales!

Google and other experts agree that since more than 50% of payload is images, then cutting image payload is one of the best ways to improve web performance. ImageEngine helps its customer cut seconds off page load time, improve SEO, reduce bounce rates, and most importantly, increase revenues.

Streamlined Responsive Image Management

ImageEngine drastically simplifies your image development process. Only one master version of an image is needed. The rest is automatic.

Streamline your responsive image workflow. With ImageEngine, you can cut huge portions of responsive image code down to a single image reference, but still get the same responsive benefits.

No more manual calculation of breakpoints and appropriate sizes for each of your images. ImageEngine detects the device model and its screen attributes to generate an image perfectly optimized for that device.

ImageEngine eliminates 90% of the responsive image process and costs so developer resources can be used on more strategically valuable projects.

SCORM Engine customers can now use a Content Distribution Network (CDN)

By TJ Seabrooks on August 28, 2017

Occasionally, our customers have run into problems that need to be solved by placing their learning content… somewhere far away from their LMS. Folks in the eLearning industry know that this has historically been a sore spot for SCORM. Over the years, we’ve helped our customers solve these problems with Rustici Cross Domain or Central / Remote when possible. However, over the last few years we’ve seen an ever growing need to make our SCORM solutions work for customers who need to use a Content Distribution Network (CDN) to deliver learning content.

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Why, and when, do LMSs need to use a CDN? The short version: using a CDN allows LMSs to put high bandwidth web assets closer to the learner in order to reduce the time it takes for learners to download and view courses. If you host your LMS in the U.S. but serve a global population, this is a capability you’ll want to investigate further. Using a CDN can help because it allows your customers in remote locations to load your eLearning content from a location in their own geographic region.

Our old solutions were great for solving a variety of problems but weren’t very helpful for customers who wanted to make use of modern, commercialized CDN solutions. To address this need, we spent the last six months developing two different ways in which customers can use our SCORM Engine solution in a CDN. SCORM Engine 2017.1 includes integrated support for Amazon’s S3 content storage and Amazon CloudFront. This support is built right in and can be easily configured during installation or upgrade for customers using AWS as their hosting provider.

To help customers who use other CDN solutions, like Microsoft Azure, Akamai, Rackspace or something else entirely, we’ve re-architected the way our client-side SCORM implementation works. These changes enable customers to host our JavaScript files on the same CDN they use for hosting their content files. The client side files will then be delivered by that same CDN. Enabling you to move your courseware closer to your learners.

Reach out to us if you want to learn more or would like to schedule an upgrade.

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TJ Seabrooks

TJ is the Chief Technology Officer at PeopleFluent, another Learning Technologies Group company, though he used to be CEO here at Rustici Software. He is passionate, expressive and has the most distinctive laugh you’ll ever hear.

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Excluding and Including Assets

By default, we serve all the static assets (images, JavaScript, CSS) located in your wp-content folder from CDN. This includes thumbnail-generation systems and minified files. WordPress core files are also served from CDN.

Our system works only by including directories to be offloaded to CDN servers.

If you have static assets you’d like included and served from the CDN that are stored outside the wp-content folder, contact support and we’ll help configure this on the server.

If you need to exclude a directory from the CDN that is located within wp-content, then every other directory in wp-content will need to be manually configured to offload to CDN. Contact support so we can help you set this up.

If you need specific files or file types excluded from the CDN, you’ll want to use an HTML post-processing rule to force it to load over your live domain instead. For example:

NOTE: Struggling to get your assets to show the CDN URL? Websites using Global Edge Security or advanced network use CDN at a DNS level instead and don’t use a specific URL. Learn more here.

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